做一題選詞填空（閱讀0.0）希望有人來回答因爲真的很急

題目：

做一題選詞填空（閱讀0.0）希望有人來回答因爲真的很急
Unlike most Chinese trains which have open – hole toilets,this one has special toilets which can __________ collect the waste.
A luckily
B seriously
C completely
D beautifully

解答：

C completely